1189790460 has 144 divisors (see below), whose sum is σ = 3830561280. Its totient is φ = 298277760.

The previous prime is 1189790449. The next prime is 1189790461. The reversal of 1189790460 is 640979811.

It is a happy number.

1189790460 is a `hidden beast` number, since 1 + 18 + 97 + 90 + 460 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1189790461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 241825 + ... + 246695.

It is an arithmetic number, because the mean of its divisors is an integer number (26601120).

Almost surely, 2^1189790460 is an apocalyptic number.

1189790460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1189790460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1915280640).

1189790460 is an abundant number, since it is smaller than the sum of its proper divisors (2640770820).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1189790460 is a wasteful number, since it uses less digits than its factorization.

1189790460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4968 (or 4963 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The square root of 1189790460 is about 34493.3393570411. The cubic root of 1189790460 is about 1059.6362998115.

The spelling of 1189790460 in words is "one billion, one hundred eighty-nine million, seven hundred ninety thousand, four hundred sixty".